Table 3.
Logistic regression models predicting the odds of being vaccinated
| Model 1: (Pseudo R2 = 0.15) | Model 2: (Pseudo R2 = 0.41) | |||
|---|---|---|---|---|
| Odds Ratio (95% CI) | p | Odds Ratio (95% CI) | p | |
| Intercept | 0.05 (0.03, 0.09) | < 0.001 | 0.06 (0.04, 0.09) | < 0.001 |
| Intervention | 2.24 (1.67, 3.00) | < 0.001 | 2.02 (1.49, 2.75) | < 0.001 |
| Female (reference category male) | 1.04 (0.98, 1.11) | 0.223 | 0.96 (0.87, 1.05) | 0.371 |
| 3-year old (reference category 2-year old) | 0.94 (0.88, 1.01) | 0.076 | 0.91 (0.83, 1.01) | 0.067 |
| Previously vaccinated (reference category not previously vaccinated) | 3.96 (3.23, 4.85) | < 0.001 | 4.33 (3.28, 5.72) | < 0.001 |
| SystmOne | 5.77 (3.94, 8.45) | < 0.001 | 5.77 (3.94, 8.45) | < 0.001 |
| Intervention *Female | – | – | 1.16 (1.02, 1.32) | 0.024 |
| Intervention*3-year old | – | – | 1.06 (0.93, 1.21) | 0.362 |
| Intervention* Previously vaccinated | – | – | 0.83 (0.55, 1.24) | 0.362 |
| Variation between practices (SD)1 | 1.10 | < 0.001 | 1.10 | < 0.001 |
| Variation between CCG (SD) 2 | 0.42 | < 0.001 | 0.42 | < 0.001 |
| ICC | 0.297 | 0.297 | ||
1 The p value displayed by practice is from a log likelihood test between a model that included and omitted the random effect
2 The p value displayed by CCG is from a log likelihood test between a model that included and omitted the random effect